Fate X Affair

Emiya Shirou was screwed. An Explosion from a magic circles goes wrong ended up his life, and making his soul’s stranded and take over a girl’s body. Not only that, the said girl was swapped with his conciousness in the middle of getting it on with her newlyweds husband. And the husband was an ace of hidden assassins organizations? Could The Iron Wrought Hero save himself and those he holds dear this time around? Crossover : FsN x Household Affair Manhwa